John Lennon’s son took to Twitter last week to mock Prince Harry’s memoir, and royal fans aren’t happy.

Sean Ono made a comment on Prince Harry’s memoir title (Image: Getty)

Sean Ono has received death threats after mocking Prince Harry’s memoir with a brutal two-word swipe.

Taking to X, formerly known as Twitter, Sean revealed that he has faced numerous death threats after he made an indirect comment that Harry should have titled his memoir “Spare Me”.

He wrote: “I’ve had three to four death threats since making fun of Harry’s book title and then later saying it was justified because he’s an idiot and that he and I both deserve to be mocked. Yay internet.”

Some comments were particularly hurtful, with one referencing his late father’s murder.

John Lennon was murdered in December 1980 by Mark David Chapman, who was sentenced to 20 years to life before being repeatedly denied parole.

Sean’s initial tweet read: “My long-awaited review of Prince Harry’s autobiography is two words: ‘Spare Me.'”

He added: “We met once. That was before I realised he was an idiot.”

In a separate post, Sean said he sympathises with Harry to a certain level but that the Duke of Sussex has “earned some mockery”.

He wrote: “I do empathise with him generally. But the way he whines and wangs on about things is really too much. I’m just having a little fun. I think he’s earned some mockery. (I’m sure I have as well).”

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Prince Harry’s book was released in January 2023 (Image: Penguin Random House)This is not the first time that Sean has criticised Spare. After the 316-page read was published, he said: “When Harry’s editor read the sentence: ‘My penis was oscillating between extremely sensitive, and borderline traumatised,’ did they not want to stage an intervention of some sort?

“I mean that is for sure one of the worst sentences ever written in the English language.”

Prince Harry released his memoir in January 2023. He received a mountain of criticism over the attacks in the book against members of the Royal Family.

Prince Harry’s memoir is titled Spare (Image: Getty)

Harry has no been tipped to release a “Spare 2.0” because of the initial release’s commercial success.

Speaking about the limited information on Harry and Meghan’s wedding in Spare, royal expert and biographer Robert Hardman – as quoted by The Independent – said: “Now, as an author, that says to me one thing and one thing only: part two might be on its way.”

Following its release, Spare became the UK’s fastest-selling non-fiction book ever.